In the Material Testing Laboratory, the standard test methods are applied, for which the verification is carried out. Verification of the methods is achieved through the inter-verification of the personnel and equipment within the laboratory itself, with a mandatory prior calibration of the equipment. The laboratory owns its own reference material with defined characteristics, which is used to control the reproducibility of the standard test method results. This paper provides an analysis of the inter-verification of the personnel on a device for alternating bending according to the method: Metal materials - Wire - Testing by alternating bending SRPS ISO 7801:2011. The results of repeated tests on the mentioned device showed the acceptability of the results with the applied test method.